The 1025 is probably too small for a grey squirrel, the 1062 is too big and not really appropriate. You need a 1030 or better yet, a 1040. Get two.

And you don't have to have actual trash, just something that LOOKS like trash. Lawn chairs, and yes, an empty (but used) trash can(s), kids bikes, c'mon, you have to use your imagination! Are you gonna let a few dipshit squirrel beat you?